What is the name of this machine and how does it work?

Question

https://ibb.co/3RBCZqs

https://ibb.co/Y2Y5qvK

https://ibb.co/hdHCRw1

https://ibb.co/xYSNJZd

Swamps outside New Orleans.

In: Engineering

Answer 1

Bonne Carre Spillway to be exact. About 10 minutes from my house.

You should have seen the wooden train bridge that is replacing!